Yellow

v. make yellow, paint or dye yellow; turn yellow (e.g. old paper)

adj. having a yellow color; cowardly (Slang); jealous; sensationalistic (about a newspaper)

n. color yellow; yolk of an egg; coward (Slang)

Yellow is the color evoked by light that stimulates both the L and M (long- and medium-wavelength) cone cells of the retina about equally, but does not significantly stimulate the S (short-wavelength) cone cells; that is, light with lots of red and green but not much blue. Light with a wavelength of 570–580 nm is a yellow, as is light with a suitable mixture of somewhat longer and shorter wavelengths. Yellow's traditional RYB complementary color is violet or purple, yellow's colorimetrically defined complementary color in both RGB and CMYK color spaces is blue.
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Noun
1. the quality or state of the chromatic color resembling the hue of sunflowers or ripe lemons
(synonym) yellowness
(hypernym) chromatic color, chromatic colour, spectral color, spectral colour
(hyponym) chrome yellow
Verb
1. turn yellow; "The pages of the book began to yellow"
(hypernym) discolor, discolour, colour, color
(derivation) yellowness
Adjective
1. similar to the color of an egg yolk
(synonym) yellowish, xanthous
(similar) chromatic
2. easily frightened
(synonym) chicken, chickenhearted, lily-livered, white-livered, yellow-bellied
(similar) cowardly, fearful
(classification) colloquialism
3. changed to a yellowish color by age; "yellowed parchment"
(synonym) yellowed
(similar) old
4. typical of tabloids; "sensational journalistic reportage of the scandal"; "yellow journalism"
(synonym) scandalmongering, sensationalistic, yellow(a)
(similar) sensational
5. cowardly or treacherous; "the little yellow stain of treason"-M.W.Straight; "too yellow to stand and fight"
(similar) dishonorable, dishonourable
6. affected by jaundice which causes yellowing of skin etc
(synonym) jaundiced, icteric
(similar) unhealthy

(v. t.)
To make yellow; to cause to have a yellow tinge or color; to dye yellow.
  

(v. i.)
To become yellow or yellower.
  

(superl.)
Being of a bright saffronlike color; of the color of gold or brass; having the hue of that part of the rainbow, or of the solar spectrum, which is between the orange and the green.
  

(n.)
A yellow pigment.
  

(n.)
A bright golden color, reflecting more light than any other except white; the color of that part of the spectrum which is between the orange and green.
  

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This is a rare disorder of lymphatic drainage. It presents with thickened,slow growing,yellow nails which may be associated with pleural effusion,bronchiectasis and lymphoedema of the legs.